A dwarf, delicate poppy, nice in any rockery even if just for the grayish, fine foliage. But no worry because it will flower almost continuously throughout the summer.
Sometimes said to be short lived, like other poppies, so allowing seeds to fall in place (hard to avoid it actually), it will ensure a permanent presence.
Germination: best if sown in the fall outdoors or in early spring. Seeds collected from white flowers capsules, but no guarantee what colour the seedlings will be.